<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- 按压时 -->
    <item android:drawable="@drawable/login_bg_gray" android:state_pressed="true" />
    <!-- 被选中时 -->
    <item android:drawable="@drawable/login_bg" android:state_selected="true" />
    <!-- 默认时 -->
    <item android:drawable="@drawable/login_bg" />

</selector>